JP4869307B2 - Magnet parts - Google Patents

Description

  The present invention belongs to a technical field related to a ring plate-shaped magnet component incorporated in a rotor, a stator or the like of an electromagnetic induction device such as a motor or a generator.

  Recently, in response to the flattening of electromagnetic induction devices such as motors and generators, ring-plate magnets are provided in which different magnetic poles are alternately arranged in the circumferential direction. This ring plate-type magnet is difficult to adapt to high output of electromagnetic induction equipment due to the fact that effective and ineffective portions of magnetic flux are distributed at the boundary of magnetic poles even if advanced magnetizing technology is executed. There is a problem that. For this reason, there is a demand for the development of a ring plate-type magnet that can be easily adapted to higher output of electromagnetic induction devices.

2. Description of the Related Art Conventionally, for example, the following technologies are known as techniques aimed at making a ring plate magnet easy to adapt to high output of electromagnetic induction devices.
Japanese Utility Model Registration No. 2515194 discloses a ring plate-type magnet in which different magnetic poles are arranged alternately in the circumferential direction and a non-magnetized region is provided at the boundary of each magnetic pole.

  The magnet according to Patent Document 1 makes it easy to adapt to high output of electromagnetic induction equipment by magnetically separating adjacent magnetic poles by a non-magnetized region and clearly separating the effective part and ineffective part of the magnetic flux Is.

  In the magnet according to Patent Document 1, there is a problem in that the manufacturing cost increases because there is difficulty in the magnetization technique and the like for forming both the magnetized region and the non-magnetized region. In addition, since the ineffective portion of the magnetic flux increases due to the formation of the non-magnetized region, there is a problem that the adaptation to the high output of the electromagnetic induction device cannot be achieved sufficiently.

  The present invention has been made in consideration of such problems, and it is intended to provide a magnet component that can be manufactured at low cost and can sufficiently meet the demand for higher output of electromagnetic induction equipment. Let it be an issue.

  In order to solve the above-mentioned problems, the magnet component according to the present invention employs means described in each claim.

That is, in claim 1, and a ring-shaped non-magnetic holder, is supported on the holder and a magnet which is exposed from each side of the holder, the magnet at both ends in the circumferential direction are magnetized to different poles arc some are formed in the shape radially is shifted to the position rotated circumferentially disposed front and back surfaces side in two layers in front and back surfaces are adsorbed to each other.

This means, the arcuate magnets that are respectively exposed from both sides are supported on the ring-shaped non-magnetic holder that only magnetized region is formed, difficulty in magnetizing technique or the like is not accompanied. Further, since the magnet of two layers is shifted in the rotational position on the front and back side, ineffectiveness of the flux is lost.

  According to a second aspect of the present invention, in the magnet component of the first aspect, the holder is made of a synthetic resin material, and the magnet is insert-molded in the holder.

  In this means, the magnet is integrated with the holder made of a synthetic resin material by insert-molding the magnet into the holder.

According to a third aspect of the present invention, a non-magnetic ring-shaped holder and a magnet attached to the holder are provided, and the holder has a circular arc-shaped magnet mounting groove arranged radially on both sides and rotates in the circumferential direction on the front and back sides. are partially is communicated is shifted to the position, the magnet is formed in a circular arc shape at both ends in the circumferential direction is fitted and attached to the magnet mounting groove of the holder are magnetized to different poles magnet mounting groove of the holder Are mutually adsorbed at the communicating portion.

With this means, since only the magnetized region is formed in the arc-shaped magnet fitted and attached to the magnet mounting groove of the non-magnetic ring-shaped holder, there is no difficulty in the magnetizing technique and the like. Further, since the magnet attached on both sides of the holder is shifted in the rotational position on the front and back side, ineffectiveness of the flux is lost.

  According to a fourth aspect of the present invention, in the magnet component of the third aspect, the holder and the magnet are bonded with an adhesive.

  According to this means, the magnet attached to the magnet mounting groove of the holder is bonded with an adhesive, thereby increasing the strength of mounting the magnet on the holder.

Magnet device according to the present invention, the arc-shaped magnets are respectively exposed from both sides are supported on the ring-shaped non-magnetic holder that only magnetized region is formed, it is accompanied difficulties in magnetizing technology, etc. Therefore, there is an effect that it can be manufactured at low cost. Further, since the magnet of two layers is shifted in the rotational position on the front and back side, because it is substantially non-wearing time region disappears invalid portion of the flux is lost, higher output of the electromagnetic induction apparatus There is an effect that can be fully adapted to.

  Furthermore, as claimed in claim 2, since the magnet is insert-molded into the holder, the magnet is integrated with the holder made of a synthetic resin material.

Further, as claimed in claim 3, since only the magnetized region is formed in the arc-shaped magnet fitted and attached to the magnet mounting groove of the non-magnetic ring-shaped holder, there is a difficulty in the magnetizing technique and the like. Therefore, there is an effect that it can be manufactured at low cost. Further, since the magnet attached on both sides of the holder is shifted in the rotational position on the front and back side, because it is substantially non-wearing time region disappears invalid portion of the flux is lost, the electromagnetic induction apparatus There is an effect that can be fully adapted to increase the output of the.

  Further, as claimed in claim 4, since the magnet to be fitted and attached to the magnet attachment groove of the holder is adhered with an adhesive, the attachment strength of the magnet to the holder is increased, so that the durability is enhanced.

  Hereinafter, the best mode for carrying out a magnet component according to the present invention will be described with reference to the drawings.

  FIGS. 1-7 shows the 1st example of the best form for implementing the magnet component which concerns on this invention.

  In the first example, the one applied to the rotor R of the motor M which is an electromagnetic induction device is shown.

  The first example includes a holder 1 and a magnet 2 as shown in FIG.

The holder 1 is formed of a non-magnetic material in a ring plate shape in which a shaft hole 11 fixed to the rotation shaft P that is a solid body of the motor M is formed in the center. Around the vicinity of the shaft hole 11, four yoke mounting holes 12 through which mounting screws B for fixing the yoke (yoke holder) Y on the stator S (coil) side of the motor M are inserted are radially drilled. Yes. Four arcuate (fan-shaped) magnet mounting grooves 13 and 14 are arranged radially on both sides around the periphery of the shaft hole 11. The magnet mounting groove 13 on the front side has a depth that is half the thickness of the holder 1. Magnet mounting groove 14 on the back side has a thickness half the depth of the holder 1, is shifted to a position rotated 45 degrees with respect to the magnet mounting groove 13 on the surface side. Accordingly, the magnet mounting grooves 13 and 14 are partially communicated as shown in FIG.

  The holder 1 can be easily manufactured by injection molding or the like when a synthetic resin material is selected as the nonmagnetic material.

  The magnet 2 is formed in an arc shape that is fitted and attached to the magnet mounting grooves 13 and 14 of the holder 1. The magnetization configuration is set such that both ends of the arc shape in the circumferential direction have different polarities (N pole, S pole) and the same polarity on the front and back sides.

  As shown in FIGS. 2 to 5, the magnet 2 is fitted and attached to the magnet mounting grooves 13 and 14 of the holder 1 to form a two-layer laminated structure, which is exposed from the holder 1 on the front surface side and the back surface. Part will be adsorbed to each other on the side. If an adhesive is applied when the magnet 2 is fitted and attached to the magnet attachment grooves 13 and 14 of the holder 1, the attachment strength of the magnet 2 to the holder 1 is increased and durability is increased.

  According to the first example, the magnet 2 can be manufactured by magnetizing an arc-shaped material, and the magnetized magnet 2 may be fitted and attached to the magnet mounting grooves 13 and 14 of the holder 1. No special sophistication is required for magnetizing and assembly techniques. Therefore, since the manufacturing cost does not increase, it can be manufactured at low cost.

  In addition, as shown in FIG. 7, since the magnet 2 having a two-layer structure is continuously annularly formed, the non-attached region is substantially lost and the ineffective portion of the magnetic flux is lost. Therefore, it is possible to satisfactorily adapt to the high output of the electromagnetic induction device. Since the magnet 2 having a two-layer structure increases the thickness and increases the magnetic flux, the motor M in which the stator S faces the both surfaces of the rotor R including the holder 1 and the magnet 2 as shown in FIG. Adaptation to high output can be achieved sufficiently. Further, since the yoke on the rotor R side of the motor M can be omitted, the motor M can be made thinner.

  8 and 9 show a second example of the best mode for carrying out the magnet component according to the present invention.

  In the second example, one applied to an outer type rotor R of a motor M which is an electromagnetic induction device is shown.

  In the second example, as shown in FIG. 8, the shaft hole 11 of the holder 1 has a large diameter through which the rotating shaft P of the hollow body of the motor M passes without contact, and the yoke mounting hole 12 of the holder 1 is omitted. Has been. And the outer diameter of the holder 1 is expanded, and a casing mounting hole 15 through which a mounting screw B for fixing to the casing C of the motor M is inserted is drilled in the expanded portion.

  According to the second example, as shown in FIG. 9, the motor M is configured in which the stator S faces the both surfaces of the rotor R including the holder 1 and the magnet 2. And the rotor R is rotated integrally with the casing C by fixing the rotating shaft P. In the second example, basically the same operations and effects as in the first example are achieved.

  As described above, in addition to the illustrated examples, it is also possible to insert the magnet 2 into a mold and inject a molten synthetic resin material to manufacture by insert molding. According to this embodiment, the magnet 2 is integrated with the holder 1 made of a synthetic resin material, and the product accuracy is increased.

  Furthermore, it is also possible to manufacture the magnet 2 by attaching the material to the holder 1 or insert-molding the material.

  Furthermore, the magnet 2 can be applied to the stator S of the motor M.

  The magnet component according to the present invention can be incorporated into a rotor, a stator or the like of a wide range of electromagnetic induction devices other than the motor M.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the 1st example of the best form for implementing the magnet component which concerns on this invention, (A) shows the assembly state and (B) shows the disassembled state. FIG. 2 is a front view of FIG. FIG. 3 is a rear view of FIG. 2. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is the YY sectional view taken on the line of FIG. It is sectional drawing which shows the example of integration in the motor of FIG. It is a perspective view of the principal part of FIG. It is a front view of the 1st example of the best form for carrying out the magnet parts concerning the present invention. FIG. 9 is a cross-sectional view showing an example of incorporation into the motor of FIG. 8.

1 Holder
13,14 Magnet mounting groove
2 Magnet
M motor

Claims (4)

And the ring-shaped non-magnetic holder, is supported on the holder and a magnet which is exposed from each side of the holder, the magnet is radially opposite ends of the circumferential direction is formed in an arc shape and is magnetized in the opposite polarities magnet parts part being shifted to the rotation position circumferentially disposed front and back surfaces side in two layers in front and back surfaces are adsorbed to each other.   2. The magnet part according to claim 1, wherein the holder is made of a synthetic resin material, and the magnet is insert-molded in the holder. A holder ring-shaped non-magnetic, and a magnet attached to the holder, the holder is shifted to a position where the magnet mounting groove of arcuate is rotated by radially arranged table back side on both sides in the circumferential direction Part of the magnets are connected, and the magnets are magnetized at opposite ends in a circular shape and are attached to the magnet mounting groove of the holder to form an arc shape. Magnet parts.   4. The magnet component according to claim 3, wherein the holder and the magnet are bonded with an adhesive.

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